US3438583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaning apparatus
Assignee: SP Industries Inc
•
Filing: 1966-04-18
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Granted: 1969-04-15
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Expires: 1986-04-18
Abstract
No abstract record available.
Inventors
- 👤 Robert Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:18
CPC Classifications
B; B60; B60S; B60S3/00; B60S3/04; B60S3/044; B05; B05B; B05B7/00; B05B7/02; B05B7/08; B05B7/0807; B05B7/0846; B05B7/12; B08; B08B; B08B3/00; B08B3/02; B08B3/026; B08B3/028; B08B2203/00; B08B2203/02; B08B2203/0217
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-14 | 1972-10-14 | 1973-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-14 | 1976-10-14 | 1977-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-14 | 1980-10-14 | 1981-04-15 | $7700.00 | Window Closed / Lapsed |